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Reaction Kinetics, Mechanisms and Catalysis

, Volume 111, Issue 1, pp 167–182 | Cite as

Behavior of different soot combustion catalysts under NOx/O2. Importance of the catalyst–soot contact

  • Noelia Guillén-Hurtado
  • Franz Edwin López-Suárez
  • Agustín Bueno-López
  • Avelina García-García
Article

Abstract

Four different catalysts (Pt/Al2O3, Ce0.8Zr0.2O2, PrO2−x and SrTiCuO3) have been investigated on a laboratory scale to evaluate their potential as diesel soot combustion catalysts under different experimental conditions, which simulate the situation found in a continuous regeneration technology trap (dual-bed configuration of catalyst and soot) or a catalyst-coated filter system (single-bed configuration, both catalyst and soot particles mixed under loose-contact mode). Under dual-bed configuration, the behavior of the catalysts towards soot combustion are very similar, despite the differences observed in the NO2 production profiles. However, under single-bed configuration, there are important differences in the soot combustion activities and in the NO2 slip profiles. The configurations chosen have an enormous impact on CO/(CO + CO2) ratios of combustion products as well. The most active catalyst under NOx + O2 is PrO2−x combining a high contribution of active oxygen-assisted soot combustion as well as high NO2 production activity along the catalytic bed.

Keywords

Soot combustion NOx + O2 Ce0.8Zr0.2O2 PrO2−x SrTiCuO3 Pt-catalyst 

Notes

Acknowledgments

The authors gratefully acknowledge the financial support of Generalitat Valenciana (Prometeo/2009/047 project) and the Spanish Ministry of Science and Innovation (project CTQ2012-30703, which is co-funded by FEDER resources). N. G. H. wishes to thank Generalitat Valenciana her Ph.D. grant within VAL i+d Program.

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2013

Authors and Affiliations

  • Noelia Guillén-Hurtado
    • 1
  • Franz Edwin López-Suárez
    • 1
  • Agustín Bueno-López
    • 1
  • Avelina García-García
    • 1
  1. 1.MCMA Group, Department of Inorganic Chemistry, Faculty of SciencesUniversity of AlicanteAlicanteSpain

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